An airport passenger shuttle company and two of its executives pleaded guilty Wednesday to illegally funneling $11,500 in contributions to Mayor Ed Lee’s 2011 election campaign.

In a deal with San Francisco District Attorney George Gascón’s office, Lorrie’s Travel & Tours, Inc., commonly known as Go Lorrie’s, and the two executives were each placed on three years of probation and fined a combined $90,000 for the misdemeanor convictions.

“We are pleased that the defendants took responsibility for their actions and hope these convictions act as a deterrent to future campaign irregularities,” Gascón said after the pleas were entered in San Francisco Superior Court.

Prosecutors contend the company’s general manager, Jason Perez, and its chief financial officer, Hanan Qutami, oversaw a money laundering scheme where employees and their spouses, including drivers and dispatchers, each gave $500 maximum individual contributions to Lee’s campaign and then were reimbursed by the company.

San Francisco campaign finance law limits contributions in municipal elections to $500 per donor and prohibits donations from corporations. State law prohibits donors from laundering campaign contributions through others to avoid these limitations.

Ruiz directed his grandson to make the donations because he felt his company was getting edged out by bigger airport van operators and needed to get Lee’s attention.

“This is something that Jason Perez got into because he was not a politically savvy person,” said Perez’s attorney, Tony Brass. “His grandfather, literally on his deathbed, asked Jason (to make the contributions). … Little did he know he was treading on the fair elections process and violating the law.”

Attorneys on both sides in the case said Perez cooperated with prosecutors and acknowledged what he had done.

Lee’s campaign returned the contributions shortly after suspicions were raised about their authenticity, and prosecutors have said there is no evidence the donations affected decisions at San Francisco International Airport.

The three entities were each charged with 25 misdemeanor counts in February.

Under Wednesday’s plea deal, the company pleaded guilty to four misdemeanors, including a corporation donating in a San Francisco election, exceeding the $500 maximum contribution and two counts of making campaign contributions under a false name. It will be fined $50,000 with sentencing set for Nov. 30.

Perez, of San Mateo, also pleaded guilty to the same four misdemeanors and faces a $20,000 fine and 480 hours of community service.

Qutami, of South San Francisco, pleaded guilty to one count of making a campaign contribution from a corporation and faces a $20,000 fine.